技術ガイド
ISO 13399・ASME規格に準拠した機械加工テクニカルガイド
切削速度・送り量・動力
4 技術ガイドドリル切削条件（回転数・送り）完全ガイド
Master the relationship between cutting speed (SFM), spindle RPM, chip load (IPR), and linear feed rate across steel, aluminum, and stainless.
ドリルの主軸回転数（RPM）の計算方法
Step-by-step mathematical breakdown of the imperial (SFM) and metric (Vc) rotational speed formulas with machine limit clipping.
穴あけ送り速度の計算（Vfとfn）
The mechanics of chip thickness, axial thrust, and calculating programmed machine feed rates (IPM and mm/min).
切削速度（Vc）と周速（SFM）の基礎知識
Why surface speed governs tool life, thermal softening of tool substrates, and surface speed guidelines across 8 common alloys.
ドリル形状・規格サイズ・タップ
3 技術ガイドドリル規格サイズ完全ガイド
Comprehensive breakdown of Fractional Inch, Numbered Wire Gauge (#1–#80), Letter (A–Z), and Metric drill systems.
ドリル先端角の比較：118°と135°シンニング
Anatomy of the chisel edge, lip relief angles, self-centering split points, and choosing the optimal point angle for each metal.
止まり穴と通り穴の加工深さ計算
Trigonometric tip allowance, tap chamfer lead-in clearance, breakthrough safety margins, and avoiding bottom collisions.
CNC加工と生産計画
2 技術ガイドタップ加工とねじ山係合率の計算
Why 75% thread engagement is standard, torque failure thresholds, tapping aluminum vs stainless, and cut vs form tap hole sizing.
CNC穴あけ固定サイクル（G81・G82・G83・G73）
Standard Fanuc/Haas/ISO holemaking cycles: spot drilling, dwells, deep-hole degressive pecking, and high-speed chip-breaking.